PHOTOS: Rihanna Strips Down for American Music Awards

Thank heaven for double-sided tape! Rihanna arrived at last night’s American Music Awards wearing an elegant black-and-white satin Marchesa gown, but when it came time for the self-confident singer to take the stage, she stripped-down — literally — into this slinky, revealing all-white number. Of course, RiRi has rarely had any problems with showing off her figure…